You could chuck an entire sheet into a repeating section, and you could probably use sheet workers to created tabbed behavior (because of the way repeating sections work, you wouldn't be able to make pure-CSS tabs that exist in many sheets). However , everybody looking at the sheet would always see the same tab, so trying this as a means to have multiple people with their own "part" of a sheet seems impractical. If Player A is looking at his tab and Player B tries to switch to his tab, Player A's view would switch to Player B's tab. This might be something reasonable for the GM to keep track of things for multiple characters in one window, but you could also just have multiple character sheet dialogs open with about the same amount of effort on the GM, and a ton less effort on the sheet creator.